227 lines
5.5 KiB
C
227 lines
5.5 KiB
C
/* Target operations for the remote server for GDB.
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Copyright (C) 2002-2015 Free Software Foundation, Inc.
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Contributed by MontaVista Software.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "server.h"
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#include "tracepoint.h"
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struct target_ops *the_target;
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int
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set_desired_thread (int use_general)
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{
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struct thread_info *found;
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if (use_general == 1)
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found = find_thread_ptid (general_thread);
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else
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found = find_thread_ptid (cont_thread);
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current_thread = found;
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return (current_thread != NULL);
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}
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int
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read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
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{
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int res;
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res = (*the_target->read_memory) (memaddr, myaddr, len);
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check_mem_read (memaddr, myaddr, len);
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return res;
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}
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/* See target/target.h. */
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int
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target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
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{
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return read_inferior_memory (memaddr, myaddr, len);
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}
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/* See target/target.h. */
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int
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target_read_uint32 (CORE_ADDR memaddr, uint32_t *result)
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{
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return read_inferior_memory (memaddr, (gdb_byte *) result, sizeof (*result));
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}
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int
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write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
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int len)
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{
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/* Lacking cleanups, there is some potential for a memory leak if the
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write fails and we go through error(). Make sure that no more than
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one buffer is ever pending by making BUFFER static. */
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static unsigned char *buffer = 0;
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int res;
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if (buffer != NULL)
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free (buffer);
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buffer = xmalloc (len);
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memcpy (buffer, myaddr, len);
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check_mem_write (memaddr, buffer, myaddr, len);
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res = (*the_target->write_memory) (memaddr, buffer, len);
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free (buffer);
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buffer = NULL;
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return res;
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}
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/* See target/target.h. */
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int
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target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr, ssize_t len)
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{
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return write_inferior_memory (memaddr, myaddr, len);
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}
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ptid_t
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mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
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int connected_wait)
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{
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ptid_t ret;
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if (connected_wait)
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server_waiting = 1;
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ret = (*the_target->wait) (ptid, ourstatus, options);
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/* We don't expose _LOADED events to gdbserver core. See the
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`dlls_changed' global. */
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if (ourstatus->kind == TARGET_WAITKIND_LOADED)
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ourstatus->kind = TARGET_WAITKIND_STOPPED;
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/* If GDB is connected through TCP/serial, then GDBserver will most
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probably be running on its own terminal/console, so it's nice to
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print there why is GDBserver exiting. If however, GDB is
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connected through stdio, then there's no need to spam the GDB
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console with this -- the user will already see the exit through
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regular GDB output, in that same terminal. */
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if (!remote_connection_is_stdio ())
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{
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if (ourstatus->kind == TARGET_WAITKIND_EXITED)
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fprintf (stderr,
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"\nChild exited with status %d\n", ourstatus->value.integer);
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else if (ourstatus->kind == TARGET_WAITKIND_SIGNALLED)
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fprintf (stderr, "\nChild terminated with signal = 0x%x (%s)\n",
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gdb_signal_to_host (ourstatus->value.sig),
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gdb_signal_to_name (ourstatus->value.sig));
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}
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if (connected_wait)
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server_waiting = 0;
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return ret;
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}
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/* See target/target.h. */
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void
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target_stop_and_wait (ptid_t ptid)
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{
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struct target_waitstatus status;
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int was_non_stop = non_stop;
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struct thread_resume resume_info;
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resume_info.thread = ptid;
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resume_info.kind = resume_stop;
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resume_info.sig = GDB_SIGNAL_0;
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(*the_target->resume) (&resume_info, 1);
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non_stop = 1;
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mywait (ptid, &status, 0, 0);
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non_stop = was_non_stop;
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}
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/* See target/target.h. */
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void
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target_continue_no_signal (ptid_t ptid)
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{
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struct thread_resume resume_info;
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resume_info.thread = ptid;
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resume_info.kind = resume_continue;
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resume_info.sig = GDB_SIGNAL_0;
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(*the_target->resume) (&resume_info, 1);
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}
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int
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start_non_stop (int nonstop)
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{
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if (the_target->start_non_stop == NULL)
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{
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if (nonstop)
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return -1;
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else
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return 0;
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}
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return (*the_target->start_non_stop) (nonstop);
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}
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void
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set_target_ops (struct target_ops *target)
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{
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the_target = XNEW (struct target_ops);
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memcpy (the_target, target, sizeof (*the_target));
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}
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/* Convert pid to printable format. */
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const char *
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target_pid_to_str (ptid_t ptid)
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{
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static char buf[80];
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if (ptid_equal (ptid, minus_one_ptid))
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xsnprintf (buf, sizeof (buf), "<all threads>");
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else if (ptid_equal (ptid, null_ptid))
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xsnprintf (buf, sizeof (buf), "<null thread>");
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else if (ptid_get_tid (ptid) != 0)
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xsnprintf (buf, sizeof (buf), "Thread %d.0x%lx",
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ptid_get_pid (ptid), ptid_get_tid (ptid));
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else if (ptid_get_lwp (ptid) != 0)
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xsnprintf (buf, sizeof (buf), "LWP %d.%ld",
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ptid_get_pid (ptid), ptid_get_lwp (ptid));
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else
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xsnprintf (buf, sizeof (buf), "Process %d",
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ptid_get_pid (ptid));
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return buf;
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}
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int
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kill_inferior (int pid)
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{
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gdb_agent_about_to_close (pid);
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return (*the_target->kill) (pid);
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}
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/* Target can do hardware single step. */
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int
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target_can_do_hardware_single_step (void)
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{
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return 1;
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}
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